A guard stands at a gate to Fort Sam Houston, Monday, June 10, 2013, in San Antonio. San Antonio police have arrested a gunman for shooting at the main gate of the U.S. Army post. (AP

 

              A guard stands at a gate to Fort Sam Houston, Monday, June 10, 2013, in San Antonio.  San Antonio police have arrested a gunman for shooting at the main gate of the U.S. Army post.  (AP
A guard stands at a gate to Fort Sam Houston, Monday, June 10, 2013, in San Antonio. San Antonio police have arrested a gunman for shooting at the main gate of the U.S. Army post. (AP Photo/Eric Gay)